LDR31854

Description：SCR MODULE 1.8KV 845A POW-R-BLOK
Series：-

SKU:f4165f2b4378 Category: SCRs - Modules Brand: Powerex Inc.

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Product introduction

Product Detailed Parameters

Description：SCR MODULE 1.8KV 845A POW-R-BLOK
Series：-
Mfr：Powerex Inc.
Package：Bulk
Structure：Series Connection - All SCRs
Number of SCRs, Diodes：2 SCRs
Voltage - Off State：1.8 kV
Current - On State (It (AV)) (Max)：540 A
Current - On State (It (RMS)) (Max)：845 A
Current - Non Rep. Surge 50, 60Hz (Itsm)：18000A, 17000A
Operating Temperature：-40°C ~ 130°C (TJ)
Mounting Type：Chassis Mount
Package / Case：POW-R-BLOK™ Module
Voltage - Gate Trigger (Vgt) (Max)：2.5 V
Current - Gate Trigger (Igt) (Max)：250 mA
Current - Hold (Ih) (Max)：300 mA
Grade：-
Qualification：-

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LDR31854

Overview

The LDR31854 is a high-power Silicon Controlled Rectifier (SCR) module manufactured by Powerex Inc. It features a POW-R-BLOK™ package designed for base mounting and contains two SCRs in series. The device supports a maximum repetitive off-state voltage of 1800V and an average on-state current of 540A, with a root-mean-square current rating of 845A. Non-repetitive surge currents reach 18000A at 50Hz and 17000A at 60Hz. Gate triggering parameters include a maximum voltage of 2.5V and current of 250mA. The component operates within a junction temperature range of -40°C to 130°C and complies with RoHS standards.

Feature Summary

Dual SCR configuration integrated into a single POW-R-BLOK™ module for compact high-current applications
High surge current capability supporting industrial power conversion demands
Designed for base mounting to facilitate thermal management in heavy-duty systems

Applications

Industrial motor drives and variable frequency drives
High-power DC-DC converters and rectifiers
Static switchgear and power control systems

Procurement Notes

Verify the specific revision level and manufacturing date code upon order confirmation to ensure compatibility with current design specifications. Confirm that the supplier provides original manufacturer documentation or traceability records. Check for any specific handling requirements related to the POW-R-BLOK™ package during storage and installation to maintain component integrity.

Selection Notes

Select this component when designing circuits requiring dual-series SCR topology within a single module footprint. Ensure the thermal design accommodates the specified junction temperature limits under continuous load conditions. Verify that the gate drive circuit can supply the required 250mA trigger current reliably across the full operating temperature range.

Part Context

This part belongs to Powerex's lineup of high-power semiconductor modules, specifically utilizing the proprietary POW-R-BLOK™ technology. This packaging style is engineered for robust mechanical stability and efficient heat dissipation in industrial environments. The LDR31854 represents a solution for applications needing high voltage blocking and significant current handling capabilities in a consolidated form factor.